FVXX20 KWBC 231900 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1900 UTC 23 AUGUST 1999 BY THE WASHINGTON VAAC . SANTA MARIA 99-002 GUATEMALA 14.76N 91.55W . BACKGROUND: SANTA MARIA GUATEMALA (1402-03) SUMMIT HEIGHT 12375 FT (3772 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL SATELLITE IMAGERY. GUATEMALA VOLCANO OBSERVATORY. . ERUPTION DETAILS: INITIAL ERUPTION TIME UNKNOWN. . DETAILS OF ASH CLOUD: INFORMATION PROVIDED BY THE GUATEMALA VOLCANO OBSERVATORY INDICATES THAT THE VOLCANO IS UNDERGOING PERIODIC ROCKFALLS WHICH RESULT IN ASH AROUND THE VOLCANO BEING STIRRED UP. THE RESULTING ASH HAS BEEN CONFINED TO THE IMMEDIATE AREA AROUND THE VOLCANO. THE SUSPICIOUS CLOUD REPORTED IN THE PREVIOUS MESSAGE HAS DISSIPATED. HOT SPOTS ARE NO LONGER VISIBLE. . TRAJECTORY: N/A. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE LATEST SIGMETS. . THIS WILL BE THE LAST MESSAGE ON THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN